﻿CHINA AQI DATASET 

Original Source:   http://www.pm25s.com

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License: free for academic research, no commercial use, resale, or redistribution permitted.
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Published: Dec 2016
Editor: Lex Berman
Programming:  Dave Strohschein
CHGIS, Center for Geographic Analysis

Email: chgis@fas.harvard.edu
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Distribution URL: https://dataverse.harvard.edu/dataverse/china_pm25s

ABSTRACT:   The hourly updates of ground monitoring observations in China are collected and stored in .csv files (one for each hour).   NOTE:  the pm25s data does NOT report locations for the reporting stations in x, y coordinates.   

An attempt to cross-walk the stations with aqicn stations is found in:  JoinTable_Lex_2017-01-18.ods  (Open Office spreadsheet)

Any assistance in determining the missing 200 station locations (out of 900) will be GREATLY appreciated!



Character set encoding:  
   UTF8  (https://en.wikipedia.org/wiki/UTF-8)



Data Dictionary:

FIELD_NAME	DESCRIPTION
CityEnglish	Pinyin  Romanized name of City (in which the station is located)
CityPinyan	Chinese name (simplified characters) of the City 
CityAvgAQI	Average AQI for all stations reporting in the City for the current hour of observations
SitePinyan	Chinese name (simplified characters) of the reporting Station
AQI	AQI values as calculated and posted on pm25s.com
PM2_5	Particulate Matter 2.5 micron diameter   µg/m3 (micrograms per cubic metre)
PM10	Particulate Matter 10 micron diameter  µg/m3 (micrograms per cubic metre)
CO	CarbonMonoxide  ppm (parts per million)
NO2	NOX  NitrogenDioxide   pphm (parts per hundred million)
SO2	SOX  SodiumDioxide  pphm (parts per hundred million)
O3_1h	Ozone reading current hour  pphm (parts per hundred million)
O3_8h	Ozone average for previous 8 hours   pphm (parts per hundred million)
AQI_qualitative	Chinese category (simplified characters) of air quality as posted on pm25s.com 
YearMonthDayHour	Hour of data collection (Chinese time)



